Yes, whole cloves can be ground and stored for months, but their flavor and aroma will diminish over time. Store them in an airtight container in a cool, dark place to maximize their shelf life.
Whole cloves contain volatile oils that give them their characteristic flavor and aroma. Grinding cloves increases the surface area exposed to air and light, accelerating the evaporation of these oils. While ground cloves won't necessarily spoil, they will lose potency and become less flavorful over time. To preserve the quality of ground cloves for as long as possible, follow these steps:
To test the freshness of whole cloves, gently press your fingernail into the bulbous head. Fresh cloves will release a small amount of oil. If they feel dry and brittle, they are likely past their prime.